Charge distribution guided by grain crystallographic orientations in polycrystalline battery materials

• Autor: Xu, Zhengrui ; Jiang, Zhisen ; Kuai, Chunguang ; Xu, Rong ; Qin, Changdong ; Zhang, Yan ; Rahman, Muhammad Mominur ; Wei, Chenxi ; Nordlund, Dennis ; Sun, Cheng-Jun ; Xiao, Xianghui ; Du, Xi-Wen ; Zhao, Kejie ; Yan, Pengfei ; Liu, Yijin ; Lin, Feng
• Assuntos: Batteries ; Charge distribution ; Charge materials ; Chemistry ; Crystallography ; Energy science and technology ; ENERGY STORAGE ; Grain orientation ; Heterogeneity ; Homogeneity ; Lithium ; Lithium ions ; Materials science ; Oxides ; Polycrystals ; Rechargeable batteries ; Surface charge
• É parte de: Nature communications, 2020-01, Vol.11 (1), p.83-83, Article 83
• Notas: ObjectType-Article-1
  SourceType-Scholarly Journals-1
  ObjectType-Feature-2
  content type line 23
  USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
  SC0012704; DMR 1832613; AC02-76SF00515; AC02-06CH11357; DMR 1832707
  National Science Foundation (NSF)
  BNL-213685-2020-JAAM
  
• Descrição: Architecting grain crystallographic orientation can modulate charge distribution and chemomechanical properties for enhancing the performance of polycrystalline battery materials. However, probing the interplay between charge distribution, grain crystallographic orientation, and performance remains a daunting challenge. Herein, we elucidate the spatially resolved charge distribution in lithium layered oxides with different grain crystallographic arrangements and establish a model to quantify their charge distributions. While the holistic "surface-to-bulk" charge distribution prevails in polycrystalline particles, the crystallographic orientation-guided redox reaction governs the charge distribution in the local charged nanodomains. Compared to the randomly oriented grains, the radially aligned grains exhibit a lower cell polarization and higher capacity retention upon battery cycling. The radially aligned grains create less tortuous lithium ion pathways, thus improving the charge homogeneity as statistically quantified from over 20 million nanodomains in polycrystalline particles. This study provides an improved understanding of the charge distribution and chemomechanical properties of polycrystalline battery materials.
  
• Editor: England: Nature Publishing Group
  
• Idioma: Inglês